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Integral catalyst for preparing chlorine by catalytic oxidation of hydrogen chloride and application of integral catalyst

A monolithic catalyst, catalytic oxidation technology, applied in the preparation of chlorides, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of low overall efficiency, high cost, and clogging of the reactor. and other problems, to achieve the effect of inhibiting heat accumulation, reducing manufacturing difficulty and manufacturing cost, and preventing heat accumulation

Inactive Publication Date: 2019-05-07
SHANGHAI CHLOR ALKALI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These catalysts also have their own advantages and disadvantages. Chromium-based catalysts are highly active but highly toxic; copper-based catalysts are low in cost but poor in stability; ruthenium-based catalysts are active but high in cost and prone to volatile deactivation
In addition, these traditional granular or powder catalysts have disadvantages such as easy wear, low overall efficiency, easy blockage of catalyst active sites in practical applications, and even blockage of reactors.

Method used

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  • Integral catalyst for preparing chlorine by catalytic oxidation of hydrogen chloride and application of integral catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 9.16kgCuCl 2 2H 2 O, 1.24kg VCl 3 , 4.76kgKCl, 4.54kgCeCl 3 ·7H 2 O drop into 86.53kg of pure water to make a solution; drop 90kg of silicon dioxide powder and 4.5kg of binder into the above solution to make a slurry; put the above slurry into an extruder, and extrude a diameter of 40mm Honeycomb-shaped cylindrical strips were cut into 100 cm lengths; the above-mentioned cylindrical strips were put into a blast oven at 100°C for 12 hours, and then transferred to a muffle furnace at 450°C for 6 hours to obtain monolithic catalyst (1). The activity is 0.29kgCl 2 / (kgcat h);

[0039] Wherein the mass percent of each component is:

[0040] Transition metals (as oxides): 5%

[0041] Alkali metal (as oxide): 3%

[0042] Rare earth metals (calculated as oxides): 2%

[0043] Carrier: margin

[0044] The transition metals are Cu and V, and Cu:V (in terms of oxide mass) is 6:1;

[0045] The alkali metal is potassium;

[0046] The rare earth metal is Ce;

Embodiment 2

[0048] 14.25kgCuCl 2 2H 2 O, 2.31kg VCl 3 , 6.34kgKCl, 6.84kgLaCl 3 ·7H 2 O was put into 79.68kg of pure water to form a solution; 85kg of activated alumina powder and 4.25kg of binder were added to the above solution to make a slurry; the above slurry was put into an extruder, and the extrusion diameter was 40mm The briquette-shaped cylindrical strips are cut into 50 cm lengths; the above-mentioned cylindrical strips are put into a 110° C. blast oven for drying for 11 hours, and then transferred to a 460° C. muffle furnace for roasting for 5 hours to obtain monolithic catalysts (2); the activity is 0.49kgCl 2 / (kgcat h);

[0049] Transition metals (as oxides): 8%

[0050] Alkali metal (as oxide): 4%

[0051] Rare earth metals (calculated as oxides): 3%

[0052] Carrier: margin

[0053] The transition metals are Cu and V, and Cu:V (in terms of oxide mass) is 5:1;

[0054] The alkali metal is potassium;

[0055] The rare earth metal is La;

Embodiment 3

[0057] 21.38kgCuCl 2 2H 2 O, 3.46kg VCl 3 , 6.34kgKCl, 9.05kgPrCl 3 ·7H 2O drop into 72.45kg of pure water to make a solution; drop 40kg of silicon dioxide powder, 40kg of activated alumina powder and 4kg of binding agent into the above solution to make a slurry; put the above slurry into an extruder, extrude A honeycomb briquette-shaped cylindrical strip with a diameter of 40 mm is cut into a length of 50 cm; the above-mentioned cylindrical strip is dropped into a 120° C. blast oven for drying for 10 hours, and then transferred to a 480° C. muffle furnace for roasting for 5 hours to obtain a monolithic catalyst ( 3). The activity is 0.68kgCl 2 / (kgcat h);

[0058] Wherein the mass percent of each component is:

[0059] Transition metals (as oxides): 12%

[0060] Alkali metal (as oxide): 4%

[0061] Rare earth metals (calculated as oxides): 4%

[0062] Carrier: margin

[0063] The transition metals are Cu and V, and Cu:V (in terms of oxide mass) is 5:1;

[0064] Th...

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Abstract

The invention discloses an integral catalyst for preparing chlorine by catalytic oxidation of hydrogen chloride and an application of the integral catalyst. The catalyst comprises the following components in percentage by mass: 5-15% of transition metals, 3-5% of an alkali metal, 2-5% of a rare earth metal and the balance of a carrier, wherein and the transition metals are Cu and V, the ratio of Cu to V is 4:1-6:1, the alkali metal is potassium, and the rare earth metal is Ce, La or Pr. The catalyst can be used for preparing chlorine by catalytic oxidation of hydrogen chloride. The applicationmethod comprises the following steps: (1) filling a reaction tube with a plurality of the catalysts with different activity levels, wherein the activity levels are increased from the gas inlet end tothe gas outlet end of the reaction tube; and (2) sending hydrogen chloride and oxygen into a fixed bed reactor for a reaction. According to the invention, heat accumulation at the hot spots can be effectively inhibited, the chlorine yield is high, non-uniform distribution of a fluid on a reaction bed layer can be eliminated, pressure drop is reduced, catalyst filling difficulty is reduced, and manufacturing difficulty and manufacturing cost of the reactor are reduced.

Description

technical field [0001] The invention relates to a catalyst for producing chlorine by catalytic oxidation of hydrogen chloride and its application. Background technique [0002] As early as 1875, Deacon proposed the method of preparing chlorine gas by catalytic oxidation of hydrogen chloride gas as a raw material, but the engineering application problems of Deacon technology itself and the rapid development of the chlor-alkali industry restricted the further development of Deacon technology. [0003] In recent years, with the development of chlor-alkali, polyurethane and other industries, the demand for chlorine gas and the outlet for hydrogen chloride have arisen. Deacon technology has received attention again, and a large number of hydrogen chloride or gas-phase catalytic oxidation of hydrogen chloride-containing gases have also been proposed. Catalysts for the preparation of chlorine gas. For example, CN1084643C discloses a catalyst with chromium oxide as the main active c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/847B01J35/04C01B7/04
Inventor 张建马斌全崔巍陈斌武
Owner SHANGHAI CHLOR ALKALI CHEM
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